Help me find the hum...please?

[dehughes]

Glad you figured it out. Each mistake is easily turned into a great learning experience that can be shared with others...

[Ripthorn]

It's true, but wiring the input jack backwards is such a boneheaded move. Oh well, at least it was simple and not a fundamental flaw in the design or anything (what do you know, I CAN design a power supply!).

[solderstain]

Well, I think I got it... Again, thanks to everyone, you are very helpful and patient with the guys like me who might otherwise be the subject of ridicule.

There probably isn't a person here who hasn't got a list of idiot moves of their own. Myself included... and I'm sure I'll make more along the way! Sometimes I get so wrapped up in the cool new thing I'm trying that the obvious just escapes me.

[dehughes]

It's true, but wiring the input jack backwards is such a boneheaded move. Oh well, at least it was simple and not a fundamental flaw in the design or anything (what do you know, I CAN design a power supply!).

Bonehead move or not, the troubleshooting that followed was a good experience, and hopefully increased your skill as a result.

My first build was perfect, except it didn't make a sound. Everything was "on", sounded like it SHOULD be amplifying my guitar, but it didn't. Turns out the only thing I forgot was the cathode wire on the PI tube. Duuuuuhhhhh.....

Check and recheck...learned that one.